中文摘要：

M ? ssbauer 光谱和三根维的原子探针(3DAP ) 被联合在 2.89 的真紧张在不加热力以延展的类低共熔体钢调查渗碳体溶解的机制。试验性的结果建议脱臼由横扫可伸缩 nano 的渗碳体，并且从渗碳体把碳转移到导致渗碳体分解的铁酸盐在渗碳体的溶解起一个重要作用。在钢的渗碳体溶解的机制在重变丑以后与 nonstoichiometric 渗碳体结构的调查联合被讨论。

英文摘要：

Mssbauer spectrum and three dimensional atom probes（3DAP） were combined to investigate the mechanism of cementite dissolution in a cold-drawn eutectoid steel at a true strain of 2.89.The experimental results suggest that the dislocations play an important role in the dissolution of the cementite by sweeping across the nano-scaled cementite,and transferring carbon from cementite to ferrite inducing cementite decomposition.The mechanism of cementite dissolution in the steel is discussed in association with the investigation of nonstoichiometric cementite structure after heavy deformation.